Home / 20,972.64-31,477.68-15,762.72

Finding the Fourth Proportional to 20,972.64, 31,477.68 and 15,762.72

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Solution

The fourth proportional to 20,972.64, 31,477.68 and 15,762.72 is: 23,658.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.64 : 31,477.68 = 15,762.72 : x
  2. Step 2: Convert to fraction form
    20,972.64/31,477.68 = 15,762.72/x
  3. Step 3: Cross multiply
    20,972.64x = 31,477.68 × 15,762.72
  4. Step 4: Simplify right side
    20,972.64x = 496,173,856.09
  5. Step 5: Solve for x
    x = 496,173,856.09/20,972.64
  6. Step 6: Final answer
    x = 23,658.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.